11:45 AM - 12:00 PM △ [19a-Z13-8] Enhancement of electromechanical coupling coefficient kt2 of ZnO thin film BAW resonators by Mg or Ca doping in the UHF frequency ranges 〇Kota Izumi1,2, Takahiko Yanagitani1,2,3 (1.Waseda Univ., 2.ZAIKEN, 3.JST-CREST)